Convert Narya (most of the way) over to a Maven Ant task based build. The
ActionScript bits remain belligerent, but the Java stuff is mostly shipshape. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6222 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
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//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
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// http://code.google.com/p/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.presents.dobj;
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import java.lang.reflect.Array;
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import com.samskivert.util.StringUtil;
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import com.threerings.presents.net.Transport;
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/**
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* An attribute changed event is dispatched when a single attribute of a distributed object has
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* changed. It can also be constructed to request an attribute change on an object and posted to
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* the dobjmgr.
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*
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* @see DObjectManager#postEvent
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*/
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public class AttributeChangedEvent extends NamedEvent
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{
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/**
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* Constructs a blank instance of this event in preparation for unserialization from the
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* network.
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*/
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public AttributeChangedEvent ()
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{
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}
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/**
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* Returns the new value of the attribute.
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*/
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public Object getValue ()
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{
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return _value;
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}
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/**
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* Returns the value of the attribute prior to the application of this event.
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*/
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public Object getOldValue ()
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{
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return _oldValue;
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}
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/**
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* Returns the new value of the attribute as a byte. This will fail if the attribute in
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* question is not a byte.
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*/
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public byte getByteValue ()
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{
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return ((Byte)_value).byteValue();
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}
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/**
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* Returns the new value of the attribute as a short. This will fail if the attribute in
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* question is not a short.
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*/
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public short getShortValue ()
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{
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return ((Short)_value).shortValue();
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}
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/**
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* Returns the new value of the attribute as an int. This will fail if the attribute in
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* question is not an int.
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*/
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public int getIntValue ()
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{
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return ((Integer)_value).intValue();
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}
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/**
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* Returns the new value of the attribute as a long. This will fail if the attribute in
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* question is not a long.
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*/
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public long getLongValue ()
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{
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return ((Long)_value).longValue();
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}
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/**
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* Returns the new value of the attribute as a float. This will fail if the attribute in
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* question is not a float.
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*/
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public float getFloatValue ()
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{
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return ((Float)_value).floatValue();
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}
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/**
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* Returns the new value of the attribute as a double. This will fail if the attribute in
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* question is not a double.
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*/
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public double getDoubleValue ()
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{
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return ((Double)_value).doubleValue();
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}
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@Override
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public boolean alreadyApplied ()
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{
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// if we have an old value, that means we're running on the master server and we have
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// already applied this attribute change to the object
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return (_oldValue != UNSET_OLD_VALUE);
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}
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@Override
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public boolean applyToObject (DObject target)
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throws ObjectAccessException
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{
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// if we're not already applied, grab the previous value and apply the attribute change
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if (!alreadyApplied()) {
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_oldValue = target.getAttribute(_name);
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Object value = _value;
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if (value != null) {
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Class<?> vclass = value.getClass();
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if (vclass.isPrimitive()) {
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// do nothing; we check this to avoid the more expensive isAssignableFrom check
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// on primitives which are far and away the most common case
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} else if (vclass.isArray()) {
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int length = Array.getLength(value);
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Object clone = Array.newInstance(vclass.getComponentType(), length);
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System.arraycopy(value, 0, clone, 0, length);
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value = clone;
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} else if (DSet.class.isAssignableFrom(vclass)) {
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value = ((DSet<?>)value).clone();
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}
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}
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// pass the new value on to the object
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target.setAttribute(_name, value);
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}
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return true;
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}
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/**
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* Constructs a new attribute changed event on the specified target object with the supplied
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* attribute name and value. <em>Do not construct these objects by hand.</em> Use {@link
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* DObject#changeAttribute} instead.
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*
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* @param targetOid the object id of the object whose attribute has changed.
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* @param name the name of the attribute (data member) that has changed.
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* @param value the new value of the attribute (in the case of primitive types, the
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* reflection-defined object-alternative is used).
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*/
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protected AttributeChangedEvent (int targetOid, String name, Object value, Object oldValue)
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{
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this(targetOid, name, value, oldValue, Transport.DEFAULT);
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}
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/**
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* Constructs a new attribute changed event on the specified target object with the supplied
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* attribute name and value. <em>Do not construct these objects by hand.</em> Use {@link
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* DObject#changeAttribute} instead.
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*
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* @param targetOid the object id of the object whose attribute has changed.
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* @param name the name of the attribute (data member) that has changed.
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* @param value the new value of the attribute (in the case of primitive types, the
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* reflection-defined object-alternative is used).
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* @param transport a hint as to the type of transport desired for the event.
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*/
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protected AttributeChangedEvent (
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int targetOid, String name, Object value, Object oldValue, Transport transport)
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{
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super(targetOid, name, transport);
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_value = value;
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_oldValue = oldValue;
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}
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@Override
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protected void notifyListener (Object listener)
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{
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if (listener instanceof AttributeChangeListener) {
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((AttributeChangeListener)listener).attributeChanged(this);
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}
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}
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@Override
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protected void toString (StringBuilder buf)
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{
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buf.append("CHANGE:");
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super.toString(buf);
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buf.append(", value=");
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StringUtil.toString(buf, _value);
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}
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protected Object _value;
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protected transient Object _oldValue = UNSET_OLD_VALUE;
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}
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